Adolescent smoking in Wuhan, China: baseline data from the Wuhan Smoking Prevention Trial.
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S. Azen | J. Unger | C. Chou | C. Anderson Johnson | P. Sun | Xinguang Chen | Hong Zheng | Chunhong Liu | H. Zheng | X. Chen | L. Yan | X. Jiang | G. Qian | S. Tan | G. Jie | L. Chunhong | X. Jiang | X. Jiang | Ping Sun | Jennifer B. Unger | Li Yan | Xia Jiang | Guo Qian | Sylvia Tan | Gong Jie | Chih-Ping Chou | C. Johnson